Portable or stationary multiple air jack



March 27, 1951 D. T. HAINES, SR 2,546,596

PORTABLE 0R STATIONARY MULTIPLE AIR JACK Filed June 17, 1946 4 Sheets-Sheet 1 INVENTOR.

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ATTDRNLYS March 27, 1951 D. T. HAINES, SR

PORTABLE OR STATIONARY MULTIPLE AIR JACK 4 SheetsSheet 2 Filed June 17, 1946 INVIFNI'OR.

ATTD R N EYS 4 Sheets$heet 3 INVENTOR. flax/[a Z f/a/rzegfik D. T. HAINES, SR

ATTU R N EYE PORTABLE 0R STATIONARY MULTIPLE AIR JACK Filed June 17, 1946 March 27, 1951 March 27, 1951 D. T. HAlNES, SR 5 5 PORTABLE OR STATIONARY MULTIPLE AIR JACK Filed June 17, 1946 4 Sheets-Sheet 4 v T INVENTOR.

ATTD R N EYE Patented Mar. 27, 1951 UNITED STATES P TENT OFFICE PORTABLE R STATIONARY MULTIPLE AIR JACK 4 Claims.

The invention relates to a jack, and more especially to a portable or stationary fluid operated jack.

The primary object of the invention is the provision of a jack of this character, wherein through multiple piston or diaphragm action under fluid pressure, either air or water, the said jack will operate for pushing or pulling power, Whichever is desired, much greater than would be developed in a larger single unit outfit. The principle is in getting as much pressure area in as small a confined space, as is possible, the jack being of novel construction and unique in the assembly of its parts, which are few in number, thus economical in repairs and replacement of such parts.

Another object of the invention is the provision of a jack of this character, wherein it can be stationary or portable, and compact enough so as in the operation thereof, assures maximum holding power, it being quick acting for gripping and clamping of work in fixtures mounted on machines, benches or otherwise.

A further object of the invention is the provision of a jack of this character, wherein enough power is had for pushing or pulling whatever may be required on a limited line pressure, it being operable with ease and dispatch.

A still further object of the invention is the provision of a jack of this character, which is simple in construction, thoroughly reliable and eificient in operation, strong, durable, positive in the working thereof, assuring a firm and secure grip on work, and inexpensive to manufacture.

With these and other objects in View the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose the preferred embodiments of the invention, and pointed out in the claims hereunto appended.

Figure l is a side elevation, partly in section of the jack constructed in accordance with the invention.

Figure 2 is a fragmentary bottom end view thereof.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1 looking in the direction of the arrows.

Figure 4 is a sectional view taken on the line 5-4 of Figure 1 looking in the direction of the arrows.

Figure 5 is a slight modification of Figure 1.

Figure 6 is a view similar to Figure 1 showing a further slight modification.

Figure '7 is a bottom end view thereof.

Figure 8 is a sectional view taken on the line 88 of Figure 6 looking in the direction of the arrows.

Figure 9 is a view similar to Figure 1 showing a still further modification.

Figure 10 is a, side view showing a vise with the jack applied thereto.

Figure 11 is a view similar to Figure 10 showing another form of vise and jack application.

Figure 12 is an elevation showing the jack used as a lifting device.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, particularly Figures 1 to 4, inclusive, which show one form of the jack constructed in accordance with the invention, comprising an elongated cylindrical body It, having end heads H and I2, respectively, these being separable from the body through the medium of internal and external threaded connections 13 therebetween.

Within the end head I! centrally thereof is slidably fitted a terminal piston it which has its tubiform stem 15 extended centrally through the body it] to the other opposite end head [2. The stem I5 at the said other opposite end head l2 has connection with another terminal piston !6 which is slidably fitted centrally in the said head l2. The piston it has a fluid passage I! leading into the stem l 5, and to this passage is connected a fluid conducting hose, only a portion of the same is indicated at 18, of a hydraulic line system, not shown, which involves a two-way valve control set up, which is also not shown, for operating the jack.

Within the body H] concentric to the stem. l5 and longitudinally distributed therethrough is a series or multiplicity of bellows-like hollow expanding and contracting acting elements it, which are confined within separated chambers 29, created by separator plates or disks 2! and 22, respectively. The plates or disks 2i and 22 within the body iii are placed concentrically about the stem I 5, and the plates or disks 22 are anchored at 23 next to their outer peripheries thereof between spacer collars 24 to the body Iii. The collars 2d internally fit the body It against the inner wall surface thereof. The plates or disks 2i at their inner peripheries are anchored at 25 between spacer collars 2%? which embrace the stem i5, and are fixedly held by the pistons I i and i 6 in assembly with the said stem.

The collars 2 are fixedly held to the body it] by the heads H and H2 in assembly therein.

The chambers 2:; outside of the elements G9 are vented by vent holes 2? opening through the said body is and the collars 2 3 fitted thereto, while fluid is admitted and exhausted to and from the elements l9 through registering ports 28, provided in the stern is and the collars 2b fitted thereto, so that the fluid is delivered and ex hausted through the hose :8 to and from these elements in the working of the jack.

The piston l6 has a hanger eye 29, for the attachment thereof to a support, not shown,

while the piston M is provided with a female coupling extension 39, which is adapted for its separable connection with a piece of work, not shown, to be pushed or pulled by the jack when operating.

The body is of the jack can be mounted in a fixed position in any suitable manner on a support therefor, not shown, there being a threaded nipple 3! formed on the head i2 for such purpose.

In Figure of the drawings there is shown a slight modification, wherein the piston 32 which is a substitute for the piston it has detachably fitted thereto a holding knob 33, while the piston which is a substitute for the piston it has detachably connected thereto a coupling rod, a portion being indicated at In this Figure 5 of the drawings, the body 36 is adapted to be held fixed, while the pistons 32 and 3t inove relatively to each other under the influence of the expanding and contracting elements within the body.

In Figures 6, 7 and 8, of the drawings there is shown another modification of the invention, wherein in lieu of the elements is there are substituted pistons and 38, respectively, for the pla es or disks 2! and 22, heretofore described, and operating within chambers 39 as created thereby between the same within the body ill! of the jack. Also interposed between the end head t! and the piston 3'? next thereto is a coiled compression spring t2, the pistons 3i and 38 carry ing packings as, respectively.

In Figure 10 of the drawings there is shown a vise l l having a base 35 with a riser as into which is fixed horizontally the jack body, while the inside jaw ll of this vise is stationary, and the outside jaw as is movable, the latter being coupled with movable stem or" the jack, so that the latter will operate this so for the clamping of work by the said vise.

In Figure ll of the drawings there is shown another form of vise, wherein the outer jaw 69 is stationary, while the inner jaw 5% is movable by the In Figure 12 of the drawings there is shown a jack assembly hereinbeicre escribed, and denoted generally at 5!, for its service as an automobile lift device, yet the latter may be used for other lilting purposes, as should be apparent.

It should be apparent that by reversing the fluid pressure line to the jack a pushing action will be had in lieu of the pulling action as would be the case with the fluid line in the position as now shown in the drawings, namely at the end head E2 in Figure 1 thereof.

What is claimed is:

i. In a multiple air unit jack, the combination which comprises a cylindrical casing having spaced outlet openings therethrough and having threaded ends, heads having centrally disposed hubs with longitudinally extended bores there through threaded onthe opposite ends of the casing, pistons positioned in the bores of the said heads, a centrally disposed tube having spaced openings through the walls thereof positioned in the casing and on the ends of which the said pistons are mounted, a plurality of spaced annular plates carried by the said centrally disposed tube, extended outwardly therefrom and positioned with the peripheries thereof in sliding engagement with the inner peripheral surface of the cylindrical casing, a plurality of spaced complementary annular plates mounted on the inner peripheral surface of the cylindrical casing and extended inwardly with centrally disposed bores therein in slidable engagement with the said centrally disposed tube and positioned to coact with the plates of the tube to expand the jack longitudinally as fluid under pressure is supplied to areas between the plates, said plates mounted on the cylinder being positioned between the plates carried by the said centrally disposed tube, the said spaced openings of the centrally disposed tube being positioned on one side of the plates carried by the tube and the outlet openings in the cylindrical casing being positioned on the opposite sides or" the said plates carried by the tube, and a fluid supply connection in a pist n at one end or" the centrally disposed tube and communicating with the interior oi the tube.

2. In a multiple air unit jack, the combination which comprises a cylindrical casing having spaced outlet openings therethrough and having threaded ends, heads having centrally disposed hubs with longitudinally extended bores therethrough threaded on the opposite ends of the casing, pistons positioned in the bores or" the said heads, a centrally disposed tube having spaced openings through the walls thereof positioned in the casing and on the ends of which the said pistons are mounted, a plurality of spaced annular plates carried by the said centrally disposed tube, extended outwardly therefrom and positioned with the peripheries thereof in sliding engagement with the inner peripheral surface of the cylindrical casing, a plurality of spaced complementary annular plates mounted on the inner peripheral surface of the cylindrical casing and extended inwardly with centrally disposed bores therein in slidable engagement with the said centrally disposed tube and positioned to enact with the plates of the tube to expand the jack longitudinally as fluid under pressure is supplied to areas between the plates, said plates mounted on the cylinder being positioned between the plates carried by the said centrally disposed tube, the said spaced openings of the centrally disposed tube being positioned on one side of the plates carried by the tube and the outlet openings in the cylindrical casing being positioned on the opposite sides of the said plates carried by the tube, a plurality of expanding elements positioned between the said coasting plates of the centrally disposed tube and cylindrical casing providing sealing means for areas between the said plates, and a fluid supply connection in a piston at one end of the centrally disposed tube and communicating with the interior of the tube.

3. In a multiple air unit jack, the combination which comprises a cylindrical casing having spaced outlet openings therethrough and having threaded ends, heads having centrally disposed hubs with longitudinally extended bores therethrough threaded on the opposite ends of the casing, pistons positioned in the bores of the said heads, a centrally disposed tube having spaced openings through the walls thereof positioned in the casing and on the ends of which the said pistons are mounted, a plurality of spaced annular plates carried by the said centrally disposed tube, extended outwardly therefrom and positioned with the peripheries thereof in sliding engagement with the inner peripheral surface of the cylindrical casing, a plurality of spaced complementary annular plates mounted on the inner peripheral surface of the cylindrical casing and extended inwardly with centrally disposed bores therein in slidable engagement with the said centrally disposed tube and positioned to coact with the plates of the tube to expand the jack longitudinally as fluid under pressure is supplied to areas between the plates, said plates mounted on the cylinder being positioned between the plates carried by the said centrally disposed tube, the said spaced openings of the centrally disposed tube being positioned on one side of the plates carried by the tube and the outlet openings in the cylindrical casing being positioned on the opposite sides of the said plates carried by the tube, a plurality of expanding elements positioned between the said coacting plates of the centrally disposed tube and cylindrical casing providing sealing means for areas between the said plates, a fluid supply connection in a piston at one end of the centrally disposed tube and communicating with the interior of the tube, and a spring in the casing positioned between a head at one end thereof and the end plate of the centrally disposed tube at the corresponding end of the jack.

4. In a multiple air unit jack, the combination which comprises a cylindrical casing I 0 having spaced outlet openings 21 therethrough and having threaded ends l3, heads H and I2 having centrally disposed hubs with longitudinally extended bores therethrough threaded on the opposite ends of the casing, pistons 14 and I6 positioned in the bores of the said heads, a centrally disposed tube 15 having spaced openings 28 through the walls thereof positioned in the casing l0 and on the ends of which the said pistons are mounted, a plurality of spacing collars 24 positioned on the inner surface of the casing, a plurality of spaced annular plates 2| carried by the said centrally disposed tube, extended outwardly therefrom and positioned with the peripheries thereof in sliding engagement with the inner peripheral surfaces of the spacing collars 24, spacing collars 26 mounted on the tube I5 and positioned between the plates 2!, a p1urality of spaced complementary annular plates 22 mounted on the inner peripheral surface of the cylindrical casing positioned between the said spacing collars 24 of the casing i9 and extended inwardly with centrally disposed bores thereof in slidable engagement with the said spacing collars on the centrally disposed tube and positioned to coact with the plates 25 of the tube to expand the jack longitudinally as fluid under pressure is supplied to areas between the plates, said plates 22 mounted on the cylinder [6 being positioned between the plates 2! carried by the said centrally disposed tube I5, the said spaced openings 28 of the centrally disposed tube being positioned on one side of the plates carried by the tube l5 and the outlet openings 2'! in the cylindrical casing [0 being positioned On the opposite sides of the said plates 2| carried by the tube, and a fluid supply connection positioned in a hub at one end of the centrally disposed tube and communicating with the interior of the tube.

DAVID TERRELL HAINES, SR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

